The minimal typical .gitignore file: common patterns

.gitignore

# IDEs

## JetBrains
.idea/
*.iml
*.ipr
*.iws

## VS Code
.vscode/
__debug_bin

## Atom
.atom/

# Archives
*.tgz
*.tar
*.gz
*.bz2
*.zip

# Binaries
*.exe
*.a
*.lib
*.so
bin/
build/

# Logs
*.log
log/
logs/

# Security
*.env
key.properties
keystore.properties
*.jks
keystore.*

# Languages and frameworks

## Python
*.pyc
__pycache__/
venv/
.mypy_cache/

## Dart/Flutter/Pub
**/doc/api/
.dart_tool/
.flutter-plugins
.flutter-plugins-dependencies
.packages
.pub-cache/
.pub/
/build/